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Coagulation monitoring device, coagulation monitoring method, and coagulation system

A monitoring device and a technology for measuring values, which are applied in the measurement of scattering characteristics, analysis by chemical reaction of materials, and material analysis by observing the influence of chemical indicators, etc. The adverse effects of liquid separation treatment and the deterioration of water quality can achieve the effects of short measurement time, stable coagulation treatment and accurate dosing

Active Publication Date: 2017-03-01
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coagulation state of SS will change due to the pH value, coagulant dosage, stirring conditions, etc. If the coagulation treatment is not carried out under appropriate conditions, the water quality of the treated water will be deteriorated, and the solid-liquid separation treatment in the subsequent process bring bad influence
[0003] In such coagulation treatment, there is a method of setting the coagulation conditions through laboratory experiments, but in the actual coagulation treatment, it takes time to set the coagulation conditions, and the water quality of the treated water may fluctuate, and the coagulation of SS cannot be accurately grasped. state

Method used

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  • Coagulation monitoring device, coagulation monitoring method, and coagulation system
  • Coagulation monitoring device, coagulation monitoring method, and coagulation system
  • Coagulation monitoring device, coagulation monitoring method, and coagulation system

Examples

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no. 1 approach

[0043] figure 1 The agglutination monitoring device of the first embodiment is shown. figure 1 The shown configuration is an example, and this configuration does not limit the agglutination monitoring device, agglutination monitoring method, or agglutination system of the present invention.

[0044] The agglutination monitoring device 2 includes a sensor unit 4 . An example of the sensor unit 4 is kept submerged in the water to be treated 8 in the coagulation tank 6 . The sensor unit 4 includes a laser irradiation unit 10 and a scattered light receiving unit 12 . The laser irradiation part 10 is formed by the light emitting end part of the first optical fiber 14-1 which guides the laser light. The scattered light receiving part 12 is formed by the light incident end part of the second optical fiber 14-2 which guides the scattered light.

[0045] A shielding member 16 is provided between the laser irradiation unit 10 and the scattered light receiving unit 12 , and a measure...

no. 2 approach

[0129] Figure 6 The agglutination system of the second embodiment is shown. This agglutination system 72 is an example of an agglutination treatment system using the agglutination monitoring device 2 of the first embodiment. exist Figure 6 in, right with figure 1 The same parts are denoted by the same reference numerals, and description thereof will be omitted.

[0130] In the coagulation monitoring device 2 , an average measured value dav indicating the SS turbidity of the treated water 8 subjected to the coagulation treatment in the coagulation tank 6 is calculated and provided to the control unit 74 . This average measured value dav represents a value obtained from the treatment state of the water to be treated 8 subjected to the coagulation treatment in the coagulation tank 6 .

[0131] The control unit 74 controls the coagulation treatment of the water to be treated 8 in the coagulation tank 6 such as the dosage of the coagulant and stirring control. The coagulant ...

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Abstract

A coagulation monitoring device for monitoring the processing state of water to be processed that is to undergo coagulation processing includes: a laser light irradiation unit for irradiating, onto a measurement area of the water to be processed, laser light that is emitted at least at a prescribed time interval, has a prescribed frequency, and has been subjected to amplitude modulation; a scattered light reception unit for receiving light that has been scattered by particles in the water to be processed in the measurement area; a signal processing unit for extracting measurement values expressing the intensity of the scattered light from the reception signal obtained by the scattered light reception unit; and a measurement value calculation unit for taking in a plurality of measurement values comprising m (where m is at least 2) sets that each have n (where n is at least 2) continuous or discontinuous measurement values, extracting a plurality of measurement values from each set in order from the lowest value, and calculating an average measurement value from a plurality of measurement values in which the lowest measurement value has been excluded from the extracted measurement values. As a result, the influence of flocs generated in water to be processed that is undergoing coagulation can be avoided, and the suspended-solid turbidity of the water to be processed can be measured stably.

Description

technical field [0001] The present invention relates to a technique for monitoring coagulation treatment of water to be treated such as clean water, industrial water, and waste water, and a technique for utilizing the same. Background technique [0002] In coagulation treatment of treated water such as clean water, industrial water, and wastewater, for example, SS (Suspended Solid: Suspended Solid) in the treated water is coagulated with inorganic coagulants or organic coagulants, and then precipitated Separation, pressurized floating separation, centrifugal separation, sand filtration, membrane separation and other solid-liquid separation processes. The coagulation state of SS will change due to the pH value, coagulant dosage, stirring conditions, etc. If the coagulation treatment is not carried out under appropriate conditions, the water quality of the treated water will be deteriorated, and the solid-liquid separation treatment in the subsequent process bring bad influen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/53G01N21/82
CPCG01N21/82G01N21/51
Inventor 长尾信明河原林直也
Owner KURITA WATER INDUSTRIES LTD
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